Laravel PDOException（1044）SQLSTATE[HY000][1044]拒绝用户访问''@'；本地主机'；到数据库'；锻造&x27；

我正在使用Laravel 5，并得到以下异常：

用户的PDO异常（1044）SQLSTATE[HY000][1044]访问被拒绝 ''@'localhost'到数据库'forge'

我的数据库配置文件是：

<?php

return [
/*
|--------------------------------------------------------------------------
| PDO Fetch Style
|--------------------------------------------------------------------------
|
| By default, database results will be returned as instances of the PHP
| stdClass object; however, you may desire to retrieve records in an
| array format for simplicity. Here you can tweak the fetch style.
|
*/

'fetch' => PDO::FETCH_CLASS,

/*
|--------------------------------------------------------------------------
| Default Database Connection Name
|--------------------------------------------------------------------------
|
| Here you may specify which of the database connections below you wish
| to use as your default connection for all database work. Of course
| you may use many connections at once using the Database library.
|
*/

'default' => 'mysql',

/*
|--------------------------------------------------------------------------
| Database Connections
|--------------------------------------------------------------------------
|
| Here are each of the database connections setup for your application.
| Of course, examples of configuring each database platform that is
| supported by Laravel is shown below to make development simple.
|
|
| All database work in Laravel is done through the PHP PDO facilities
| so make sure you have the driver for your particular database of
| choice installed on your machine before you begin development.
|
*/

'connections' => [

    'sqlite' => [
        'driver'   => 'sqlite',
        'database' => storage_path().'/database.sqlite',
        'prefix'   => '',
    ],

    'mysql' => [
        'driver'    => 'mysql',
        'host'      => env('DB_HOST', 'localhost'),
        'database'  => env('DB_DATABASE', 'forge'),
        'username'  => env('DB_USERNAME', 'forge'),
        'password'  => env('DB_PASSWORD', ''),
        'charset'   => 'utf8',
        'collation' => 'utf8_unicode_ci',
        'prefix'    => '',
        'strict'    => false,
    ],

    'pgsql' => [
        'driver'   => 'pgsql',
        'host'     => env('DB_HOST', 'localhost'),
        'database' => env('DB_DATABASE', 'forge'),
        'username' => env('DB_USERNAME', 'forge'),
        'password' => env('DB_PASSWORD', ''),
        'charset'  => 'utf8',
        'prefix'   => '',
        'schema'   => 'public',
    ],

    'sqlsrv' => [
        'driver'   => 'sqlsrv',
        'host'     => env('DB_HOST', 'localhost'),
        'database' => env('DB_DATABASE', 'forge'),
        'username' => env('DB_USERNAME', 'forge'),
        'password' => env('DB_PASSWORD', ''),
        'prefix'   => '',
    ],

],

/*
|--------------------------------------------------------------------------
| Migration Repository Table
|--------------------------------------------------------------------------
|
| This table keeps track of all the migrations that have already run for
| your application. Using this information, we can determine which of
| the migrations on disk haven't actually been run in the database.
|
*/

'migrations' => 'migrations',

/*
|--------------------------------------------------------------------------
| Redis Databases
|--------------------------------------------------------------------------
|
| Redis is an open source, fast, and advanced key-value store that also
| provides a richer set of commands than a typical key-value systems
| such as APC or Memcached. Laravel makes it easy to dig right in.
|
*/

'redis' => [

    'cluster' => false,

    'default' => [
        'host'     => '127.0.0.1',
        'port'     => 6379,
        'database' => 0,
    ],

    ],

];

---

在根目录中放置一个
.env
文件，并将此代码粘贴到那里

APP_ENV=local
APP_DEBUG=true
APP_KEY=1CaND3OKKvOGSBAlCg6IyrRmTQWwZjOO

DB_HOST = localhost
DB_DATABASE = YOUR_DATABASE_NAME
DB_USERNAME = USER_NAME
DB_PASSWORD = PASSWORD

CACHE_DRIVER=file
SESSION_DRIVER=file
QUEUE_DRIVER=sync

MAIL_DRIVER=smtp
MAIL_HOST=mailtrap.io
MAIL_PORT=2525
MAIL_USERNAME=null
MAIL_PASSWORD=null

更新您的数据库，用户名和密码字段在这里，它应该解决您的问题。在配置文件
env（）
中，函数从这里查找此文件和变量

更新：在运行应用程序或迁移之前，必须创建一个空白数据库。
您可以使用以下工具检查当前环境：
php artisan env

下一个


在config/development | staging（文件夹）下创建
使用
development | staging access
编辑
.env
文件
APP_env=development | staging | production
尝试转到database.php文件，更正您的数据库名称、用户名和密码

<?php

return [

    /*
    |--------------------------------------------------------------------------
    | PDO Fetch Style
    |--------------------------------------------------------------------------
    |
    | By default, database results will be returned as instances of the PHP
    | stdClass object; however, you may desire to retrieve records in an
    | array format for simplicity. Here you can tweak the fetch style.
    |
    */

    'fetch' => PDO::FETCH_OBJ,

    /*
    |--------------------------------------------------------------------------
    | Default Database Connection Name
    |--------------------------------------------------------------------------
    |
    | Here you may specify which of the database connections below you wish
    | to use as your default connection for all database work. Of course
    | you may use many connections at once using the Database library.
    |
    */

    'default' => env('DB_CONNECTION', 'mysql'),

    /*
    |--------------------------------------------------------------------------
    | Database Connections
    |--------------------------------------------------------------------------
    |
    | Here are each of the database connections setup for your application.
    | Of course, examples of configuring each database platform that is
    | supported by Laravel is shown below to make development simple.
    |
    |
    | All database work in Laravel is done through the PHP PDO facilities
    | so make sure you have the driver for your particular database of
    | choice installed on your machine before you begin development.
    |
    */

    'connections' => [

        'sqlite' => [
            'driver' => 'sqlite',
            'database' => env('DB_DATABASE', database_path('database.sqlite')),
            'prefix' => '',
        ],

        'mysql' => [
            'driver' => 'mysql',
            'host' => env('DB_HOST', 'localhost'),
            'port' => env('DB_PORT', '3306'),
            'database' => env('DB_DATABASE', 'msm'),----database name
            'username' => env('DB_USERNAME', 'root'),--localhost username
            'password' => env('DB_PASSWORD', ''),--localhost password
            'charset' => 'utf8',
            'collation' => 'utf8_unicode_ci',
            'prefix' => '',
            'strict' => true,
            'engine' => null,
        ],

        'pgsql' => [
            'driver' => 'pgsql',
            'host' => env('DB_HOST', 'localhost'),
            'port' => env('DB_PORT', '5432'),
            'database' => env('DB_DATABASE', 'msm'),----database name
            'username' => env('DB_USERNAME', 'root'),--localhost username
            'password' => env('DB_PASSWORD', ''),--localhost password
            'charset' => 'utf8',
            'prefix' => '',
            'schema' => 'public',
            'sslmode' => 'prefer',
        ],

    ],

    /*
    |--------------------------------------------------------------------------
    | Migration Repository Table
    |--------------------------------------------------------------------------
    |
    | This table keeps track of all the migrations that have already run for
    | your application. Using this information, we can determine which of
    | the migrations on disk haven't actually been run in the database.
    |
    */

    'migrations' => 'migrations',

    /*
    |--------------------------------------------------------------------------
    | Redis Databases
    |--------------------------------------------------------------------------
    |
    | Redis is an open source, fast, and advanced key-value store that also
    | provides a richer set of commands than a typical key-value systems
    | such as APC or Memcached. Laravel makes it easy to dig right in.
    |
    */

    'redis' => [

        'cluster' => false,

        'default' => [
            'host' => env('REDIS_HOST', 'localhost'),
            'password' => env('REDIS_PASSWORD', null),
            'port' => env('REDIS_PORT', 6379),
            'database' => 0,
        ],

    ],

];

将来某个时候。如果使用MySQL而不是Homestead，这将是一个基本设置。Config->database.php文件

'mysql' => [
        'driver'    => 'mysql',
        'host'      => env('DB_HOST', 'localhost'),
        'database'  => env('DB_DATABASE', 'yourDatabaseName'),
        'username'  => env('DB_USERNAME', 'root'),
        'password'  => env('DB_PASSWORD'),
        'charset'   => 'utf8',
        'collation' => 'utf8_unicode_ci',
        'prefix'    => '',
        'strict'    => false,
    ],

在你的.env文件中

APP_ENV=local
APP_DEBUG=true
APP_KEY=ruA9CAKRJCFgLOD1nc5o1BmvaTGokasi

DB_HOST=localhost
DB_DATABASE=yourDatabaseName


CACHE_DRIVER=file
SESSION_DRIVER=file
QUEUE_DRIVER=sync

MAIL_DRIVER=smtp
MAIL_HOST=mailtrap.io
MAIL_PORT=2525
MAIL_USERNAME=null
MAIL_PASSWORD=null
MAIL_ENCRYPTION=null

如果您运行该命令，它应该可以正常工作。
如果您在访问数据库时不需要登录

尝试将数据库用户名作为
根用户
和密码字段留空

这解决了我的问题

DB_CONNECTION=mysql
DB_HOST=127.0.0.1
DB_PORT=3306
DB_DATABASE=YOUR_DATABASE_NAME
DB_USERNAME=root
DB_PASSWORD=

如果在XAMPP中安装MySQL时没有默认用户名，则应将
DB_USERNAME=
设置为
root
。
此问题可能是由于文件没有预期的“.env”扩展名引起的

如果您在Windows中隐藏了文件扩展名（默认情况下是打开的），那么它很容易看起来像扩展名是“.env”，而实际上像“.env.txt”

这意味着程序将无法找到您的“.env”文件，因为它没有正确的扩展名

使用类似Sublime Text的编辑器打开文件，您将看到实际扩展名是什么。如果它有“.txt”扩展名，请删除该部分并重新保存。
我收到的是相同的消息，用户名为空。用户名始终为空

问题在于MySQL。SQLSTATE错误消息直接从MySQL传递

于是我删除了数据库和用户。在PhpMyAdmin的“数据库”选项卡中重新创建数据库。重要的是分别添加了用户和权限。这解决了问题

我可以从MySQL客户端连接并运行迁移
 我们忘了在.env文件中设置
DB\u USERNAME=
，因此出现以下错误：

用户“@'localhost”对的SQLSTATE[HY000][1044]访问被拒绝
数据库“forge”

打开.env文件并编辑它。只需设置正确的数据库凭据：

DB_USERNAME=         //Your Database Username           

如果在安装时没有默认用户名，
DB_USERNAME
应设置为
root

更改.env后，在终端中输入以下命令以清除缓存：
php artisan config:cache


注意：如果仍然存在错误

如果您使用的是PHP的默认web服务器（例如
PHP artisan serve
），则需要重新启动服务器

或

如果使用了XAMPP，请重新启动Apache服务器
在同一项目/查询中使用多个数据库时，也会出现此问题

我通过对所有数据库使用相同的DB_用户名解决了相同的问题，
因为我在同一个项目中使用了多个数据库，并且每个数据库DB_用户名都不同，所以当我从多个数据库中运行查询select、update、delete等时，就得到了这个错误

因为如果在查询中使用多个表，并且数据库DB_用户名不同，则会出现此错误

解决方案：

如果您使用/连接多个数据库，那么您应该为所有数据库使用相同的DB_用户名
您是否使用homestead作为开发环境？您是否也将
.env
文件用于环境？如果你能共享你的数据库配置文件就更好了。我添加了配置文件。当前应用程序环境：productionThis.env文件不在我的根目录中。。但在创建它之后，问题仍然是一样的。我解决了它。我的数据库和用户名都是“forge”。我更改了我的数据库名称和用户名并解决了它。。。感谢@Ariful haque感谢
php-artisan-config:cache
-->+1Nice-response@krishnel。